Set System 6 jumpers J3/J4 for a single game EPROM at IC14
Steps
- Find jumpers J3 and J4 just above the IC22 ROM socket.
- Fit J3 and remove J4.
- Fit the 2716 game EPROM at IC14 and leave IC21, IC22 and IC26 empty.
- This applies to every System 6 game except Firepower, which needs its own modification (see the Firepower entries).
Systems
Related tips
- System 6 CPU board jumpers J1 to J6
- EPROM types used for System 3 to 7 game code
- Installing a single-EPROM adapter in the CPU socket
- Identifying a System 3 to 7 CPU board
- What changed on the System 6A CPU board
- System 6 CPU board test points
- Which System 3 to 7 games use which flipper ROM system
- A System 7 CPU board can run any System 3 to 7 game
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)